Year	Percent of total labor force
1980	7.133
1981	9.65
1982	10.725
1983	11.475
1984	11.75
1985	11.375
1986	11.325
1987	10.425
1988	8.575
1989	7.225
1990	7.1
1991	8.85
1992	9.95
1993	10.375
1994	9.5
1995	8.625
1996	8.1
1997	6.95
1998	6.25
1999	5.975
2000	5.45
2001	5.1
2002	5.2
2003	5
2004	4.75
2005	4.825
2006	5.425
2007	5.35
2008	5.725
2009	7.625
2010	7.9
2011	8.1
2012	7.975
2013	7.575
2014	6.2
2015	5.375
2016	4.875
2017	4.425
2018	4.075
2019	4.229
2020	4.4
2021	4.3
2022	4.2
2023	4.2
2024	4.2